code: def testZero(self):
      # Inputting zeros should return no fades(empty array)
      sr = 44100
      size = int(10 * sr / hopsize)
      rms = zeros(size)
      self.assertEqualMatrix(
          FadeDetection(frameRate=4)(zeros(size)), [[], []]
      )
  
file_path: essentia/test/src/unittests/highlevel/test_fadedetection.py
imports: from numpy import *
  from essentia_test import *
label_desc: Use image node_id 1 for calling the TestFadeDetection obj's underlying member method code with example usage: obj.testZero() without return types